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    Command:

    jfs_fsck

    
    
    
    

    SYNOPSIS

           jfs_fsck [ -afnpvV ] [ -j journal_device ] [ --omit_journal_replay ]  [
           --replay_journal_only ] device
    
    
    

    DESCRIPTION

           jfs_fsck is used to replay the JFS transaction log, check a JFS format-
           ted device for errors, and fix any errors found.
    
           device is the special file name corresponding to the actual  device  to
           be checked (e.g. /dev/hdb1).
    
           jfs_fsck must be run as root.
    
    
    

    WARNING

           jfs_fsck  should  only  be  used to check an unmounted file system or a
           file system that is mounted READ ONLY.  Using jfs_fsck to check a  file
           system  mounted  other  than  READ ONLY could seriously damage the file
           system!
    
    
    

    OPTIONS

           If no options are selected, the default is -p.
    
           -a     Autocheck mode - Replay the transaction log.   Do  not  continue
                  fsck  processing  unless the aggregate state is dirty or the log
                  replay failed.  Functionally equivalent to -p.   Autocheck  mode
                  is  typically  the  default mode used when jfs_fsck is called at
                  boot time.
    
           -f     Replay the transaction log and force checking even if  the  file
                  system appears clean.  Repair all problems automatically.
    
           -j journal_device
                  Specify the journal device.
    
           -n     Open  the  file system read only.  Do not replay the transaction
                  log.  Report errors, but do not repair them.
    
           --omit_journal_replay
                  Omit the replay of the transaction log.  This option should  not
                  be used unless as a last resort (i.e.  the log has been severely
                  corrupted and replaying it causes further problems).
    
           -p     Automatically repair ("preen")  the  file  system.   Replay  the
                  transaction  log.   Do  not  continue fsck processing unless the
                  aggregate state is dirty or the log replay failed.  Functionally
                  equivalent to -a.
    
    
    

    EXAMPLES

           Check the 3rd partition on the 2nd hard disk, print  extended  informa-
           tion  to  stdout,  replay  the transaction log, force complete jfs_fsck
           checking, and give permission to repair all errors:
    
                  jfs_fsck -v -f /dev/hdb3
    
           Check the 5th partition on the 1st hard disk, and report,  but  do  not
           repair, any errors:
    
                  jfs_fsck -n /dev/hda5
    
    
    

    EXIT CODE

           The exit code returned by jfs_fsck represents one of the following con-
           ditions:
    
            0     No errors
    
            1     File system errors corrected  and/or  transaction  log  replayed
                  successfully
    
            2     File  system errors corrected, system should be rebooted if file
                  system was mounted
    
            4     File system errors left uncorrected
    
            8     Operational error
    
            16    Usage or syntax error
    
            128   Shared library error
    
    
    

    REPORTING BUGS

           If you find a bug in JFS or jfs_fsck, please  report  it  via  the  bug
           tracking system ("Report Bugs" section) of the JFS project web site:
           http://jfs.sourceforge.net/
    
           Please  send  as  much pertinent information as possible, including the
           complete output of running jfs_fsck with  the  -v  option  on  the  JFS
           device.
    
    
    

    SEE ALSO

           fsck(8),   jfs_mkfs(8),  jfs_fscklog(8),  jfs_tune(8),  jfs_logdump(8),
           jfs_debugfs(8)
    
    
    

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